«[...]We had good jokes. Here's one: an American robot is on the roof [of the building containing the burning Chernobyl reactor] for five minutes, and then it breaks down. The Japanese robot is on the roof for five minutes, and then breaks down.
The Russian robot is up there two hours! Then a command comes in over the loudspeaker: "Private Ivanov! In two hours, you're welcome to come down and have a cigarette break."